package com.wzy.netty.core.http;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.*;
import io.netty.util.CharsetUtil;

import java.net.URI;

/**
 * 描述  SimpleChannelInboundHandler:ChannelInboundHandlerAdapter的子类
 * HttpObject: 客户端和服务器端相互通讯的数据被封装成 HttpObject
 * 创建人    Wzy
 * 创建时间: 2020-05-21  20:42
 */
public class TestHttpServerHandler extends SimpleChannelInboundHandler<HttpObject> {

    //读取客户端数据
    @Override
    protected void channelRead0(ChannelHandlerContext ctx, HttpObject msg) throws Exception {

        //判断 msg 是不是 httpRequest请求
        if (msg instanceof HttpRequest) {
            System.out.println("msg 类型" + msg.getClass());
            System.out.println("客户端地址:" + ctx.channel().remoteAddress());
            //获取到 msg
            HttpRequest httpRequest = (HttpRequest) msg;
            //获取uri
            URI uri = new URI(httpRequest.uri());
            if ("/favicon.ico".equals(uri.getPath())) {
                System.out.println("请求了 favicon.ico,不做响应");
                return;
            }
            //回复信息给浏览器
            ByteBuf content = Unpooled.copiedBuffer("hello,我是服务器", CharsetUtil.UTF_16);

            //构造一个 http的响应
            DefaultFullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK, content);
            response.headers().set(HttpHeaderNames.CONTENT_TYPE, "text/plain");
            response.headers().set(HttpHeaderNames.CONTENT_LENGTH, content.readableBytes());
            //将构建好的 response 返回\
            ctx.writeAndFlush(response);

        }
    }
}
